# Is PLUS compatible with Cygnus-PFS a DC magnetic navigate

**URL:** <https://discourse.slicer.org/t/is-plus-compatible-with-cygnus-pfs-a-dc-magnetic-navigate/2123>\
**Category:** Support\
**Created:** [February 20, 2018, 1:33pm UTC](https://discourse.slicer.org/t/is-plus-compatible-with-cygnus-pfs-a-dc-magnetic-navigate/2123 "2018-02-20T13:33:22Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![timeanddoctor](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/timeanddoctor/32/5839_2.png) [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Post date:** [February 20, 2018, 1:33pm UTC](https://discourse.slicer.org/t/is-plus-compatible-with-cygnus-pfs-a-dc-magnetic-navigate/2123/1 "2018-02-20T13:33:22Z")

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Is PLUS compatible with Cygnus-PFS?  
Cygnus-PFS:[paper](http://ciimedical.com/RegulusArticle.pdf)  
I read this post and there is nothing information like that.  
[http://perk-software.cs.queensu.ca/plus/doc/nightly/user/DeviceNDI.html](http://perk-software.cs.queensu.ca/plus/doc/nightly/user/DeviceNDI.html)[https://discourse.slicer.org/t/ndi-vega-compatibility/1969](https://discourse.slicer.org/t/ndi-vega-compatibility/1969)

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [February 20, 2018, 1:53pm UTC](https://discourse.slicer.org/t/is-plus-compatible-with-cygnus-pfs-a-dc-magnetic-navigate/2123/2 "2018-02-20T13:53:05Z")

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I have never heard of Cygnus-PFS but from their website it seems that they use Ascension 3DG tracker, which Plus can connect to. However, only one application can connect to an Ascension tracker at a time, so while you are using the Cygnus software then you cannot connect using Plus at the same time.

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**Author:** ![timeanddoctor](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/timeanddoctor/32/5839_2.png) [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Post date:** [February 20, 2018, 1:53pm UTC](https://discourse.slicer.org/t/is-plus-compatible-with-cygnus-pfs-a-dc-magnetic-navigate/2123/3 "2018-02-20T13:53:09Z")

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> The Regulus Navigator (RN) utilizes a commercially available 144 Hz pulsed DC  
> Flock of Birds (Ascension Technology Corporation; Burlington, VT 05402) magnetic  
> field transmitter as its digitizer which defines its three-dimensional coordinate system.

I cheaked carefully, find I can use NDI…

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**Author:** ![timeanddoctor](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/timeanddoctor/32/5839_2.png) [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Post date:** [February 20, 2018, 1:54pm UTC](https://discourse.slicer.org/t/is-plus-compatible-with-cygnus-pfs-a-dc-magnetic-navigate/2123/4 "2018-02-20T13:54:15Z")

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ok, I will try it…  
Thanks.

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [February 20, 2018, 1:54pm UTC](https://discourse.slicer.org/t/is-plus-compatible-with-cygnus-pfs-a-dc-magnetic-navigate/2123/5 "2018-02-20T13:54:51Z")

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The paper that was referenced described a 20+ year old variant of the system that used Ascension Flock-of-birds tracker. However, from the [pictures on their website](http://ciimedical.com/index.php?p=arm) it is clear that their current system uses Ascension 3DG.

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**Author:** ![timeanddoctor](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/timeanddoctor/32/5839_2.png) [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Post date:** [February 20, 2018, 1:57pm UTC](https://discourse.slicer.org/t/is-plus-compatible-with-cygnus-pfs-a-dc-magnetic-navigate/2123/6 "2018-02-20T13:57:06Z")

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[http://perk-software.cs.queensu.ca/plus/doc/nightly/user/DeviceNDI.html](http://perk-software.cs.queensu.ca/plus/doc/nightly/user/DeviceNDI.html)  
So I can connect it by PLUS follow the above tutorial?  
Thanks!

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [February 20, 2018, 1:58pm UTC](https://discourse.slicer.org/t/is-plus-compatible-with-cygnus-pfs-a-dc-magnetic-navigate/2123/7 "2018-02-20T13:58:30Z")

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It is an Ascension 3DG tracker, so you can find information on this page: [http://perk-software.cs.queensu.ca/plus/doc/nightly/user/DeviceAscension3DG.html](http://perk-software.cs.queensu.ca/plus/doc/nightly/user/DeviceAscension3DG.html)

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**Author:** ![timeanddoctor](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/timeanddoctor/32/5839_2.png) [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Post date:** [February 20, 2018, 2:00pm UTC](https://discourse.slicer.org/t/is-plus-compatible-with-cygnus-pfs-a-dc-magnetic-navigate/2123/8 "2018-02-20T14:00:25Z")

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Ok, Thanks.  
I will connect it and do something with 3d slicer.